1426, from O.Fr.
transgression (12c.), from L.L.
transgressionem (nom.
transgressio) "a transgression of the law," from L. "a going over," from
transgressus, pp. of
transgredi "go beyond," from
trans- "across" +
gradi (pp.
gressus) "to walk, go" (see
grade). The verb
transgress is recorded from 1526.
Transgressor is first recorded 1377.